Instructions

9x9 Sudoku Rules

6x6 Sudoku Rules

Fill in the empty squares with digits 1 through 9 so that every number appears exactly once in every row, column and (3x3) block.

Fill in the empty squares with digits 1 through 6 so that every number appears exactly once in every row, column and (2x3) block.

How to play

Click on an empty square. The selected cell color changes to pink.

You can pencil in the possible numbers by clicking on them in the upper group. The clicked numbers will appear in the selected cell.

Clicking the same number twice will remove it.

Once you are sure of your guess you can click on the number in the lower group. The pencil button group disapears and the number will appear in the cell. The color of the guessed number depends on with the currently selected Pen Color.

Clicking on the same number again will remove it and the previously penciled in number(s) will appear again.

The game is finished when you guess all the numbers.

Clear

Clears the selected cell completely.

Peek

This is for cheating! if you are frustrated and wish to peek at the value of a particular cell. Select the cell and click on the "Peek" button.

Pen Color

Clicking on the radio button will select the Pen Color. This is helpful if you arrive at several possiblities and you have to try one. Select a different Pen Color and continue with the puzzle. However, if after several moves you discover a contradiction, you need to undo all the previous guesses. Click on the clear button next to the color and all the numbers with that color will be undone.

New Game

You can play again by clicking on the Easy, Medium or hard buttons

Print

Click on print will show a printable version of the game with its solution on the following page

Save

(coming soon) You can save the current game for a later time. You need to have to be a registered user to do that.